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Leases - Schedule of Future Minimum Lease Payments under Operating Leases for Continuing and Discontinued Operations (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Property Subject to or Available for Operating Lease [Line Items]  
Operating Leases, 2019 $ 21,884 [1]
Operating Leases, 2020 17,728
Operating Leases, 2021 12,070
Operating Leases, 2022 8,638
Operating Leases, 2023 and thereafter 22,298
Operating Leases, Total 82,618
Continuing Operation [Member]  
Property Subject to or Available for Operating Lease [Line Items]  
Operating Leases, 2019 21,076 [1]
Operating Leases, 2020 17,728
Operating Leases, 2021 12,070
Operating Leases, 2022 8,638
Operating Leases, 2023 and thereafter 22,298
Operating Leases, Total 81,810
Discontinued Operations [Member]  
Property Subject to or Available for Operating Lease [Line Items]  
Operating Leases, 2019 808 [1]
Operating Leases, Total $ 808
[1] Amounts include payments due associated with executed early terminations of real estate leases.